Grinding-mill.



No. 634,052. Patented on. 3, I899.

0. J. ZIEGLER.

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No. 634,052.. r Patented Oct. 3, I899.

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GRINDING HILL. (Application filed In. 31, 1899.) (No new.) a shan -sheet3 UNITED: STATES.

PATENT OFFICE.

OSCAR 'J. 'ZIEGLER, OF FREEPORT, ILLINOIS, ASSIGNOR TO THE STOVERMANUFACTURING COMPANY, OF SAME PLACEI GRINDING-MILL.

srncIFIoA'rIoN forming part of Letters Patent No. 634,052, dated October3, 1899.

Application filed March 31, less.

T0 at whom it may concern;

Be it known that I, OSCAR J. ZIEGLER, acitizen of the United States ofAmerica, residing at Freeport, in the county of Stephenson and- State ofIllinois, have invented certain new and useful Improvements inGrinding-Mills, of which the following is a specification.

My invention relates to improvements in mills of the class commonlyknown as feedgrinders,and is fully described and claimed hereinafter. 7

Referring to the accompanying drawings, which form a part of thisspecification, Figure 1 is an isometrical view of a mill embodying myimprovements. Fig. 2 is a central vertical section of the mill shown inFig. 1. Fig. 3 is alike viewof the same with some of the parts thereofin different positions from those shown in Fig. 2. Figs. 4, 5, and 6 aredetail viewshereinafter fully described.

A is a ground-feed receptacle of any desired form and construction.

B is the base of the mill, having countersunk thereinto a circulargeared track B and a circular smooth trackB and provided I with openingsB extending vertically there-I through, to allow any portion of theground feed that may chance to 'work thereint-o from. the grindingburswhen the mill is operated to pass downward thereout. I

B is an outside grinding-bur provided with anupwardly-projecting.annnlarfiange B and spider B, having a verticalopening B" in the apex thereof and rigidly connected with the base B.

C is a master-ring having horizontal stnbaxles G projectingradiallyinward from the inside thereof.

' C are pinions mounted on the stub-axles C and meshing with thecircular geared track B, countersunk into the base B of the mill.

0 are tintifriction-rollers mounted on the stub axles O, concentricaland preferably integral with the pinions G and adapted to traverse the,smooth circular track B countersunk into the basal? of the mill.

(3 are lugs to whicha sweep (not shown) for. rotating the master-ring Cmay beattached.

D is an inside grinding-bur, the counter- SerialNm71L264. No model.)

.to admit and engage the peripheries of the antifriction-rollers 0provided with an annular flange E projecting downward therefromwithinthe upwardly-projecting annular flange B on the part B and a spider Esupporting a downwardly-extending tenon E adapted to enter the mortise Din the part D.

' F is a gear-guarding cylinder rigidly securedat .its upper end to theunder face of the driving-ring E and projecting downwardly therefrombetween the outside grinding-bur B and the master-ring O and countersunkgeared track B in the base B ofthe mill to the vertical openings Bi,extending therethrough.

G is a yoke resting upon the spider of the driving-ring E.

His a long bolt extending vertically through the parts D E E G,whereinto it is secured by means of the lever-nut J. The bolt H suspendsthe inside grinding-bur D from. the driving-ring E,'and the lever-nut Jserves to adjust the inside and outside grinding-burs 'B D by drawingthem into closer proximity,

or vice versa.

- The collar K and bolts and nuts K K secure the driving-ring E intoengagement with pinions O 7 l The countersink'in the base B isconstructed,- as shown in'Figs. 2 and 3, to adapt it for use as atrack-tank for oil, and when filled therewith it lubricates the pinionsC and the too ground feed does escape between the flanges B E. In thatevent the gear-guarding cylinder F prevents it from getting into thegears, geared tracks, antifriction rollers, and their tracks, and itpasses by the operation of gravity and by reason of the vibrations ofthe running mill downward between the outside grinding-bur B andgear-guarding cylinder F and outward through the vertical openings 13*in the base 13 of the mill.

The antifriction-rollers C render the mill light running, and thus easyto operate, and the pinions G serve not only to communicate power fromthe master-ring O to the drivingring E and thence to the insidegrindingbur D, but they also operate to speed them to a velocity doublethat of the master-ring O.

The parts B O E F are so formed and arranged as to produce a completeinclosure for the pinions and antifriction-rollers C O and their tracks,thereby protectingthem and the circular tank of oil they run in fromdust, dirt, and other foreign substances.

I claim- 1. In a grinding-mill, in combination ,abase having countersunkthereinto a circular geared track and a circular smooth track, amaster-ring having horizontal stub-axles proj ecting radially inwardfrom the inside thereof and provided With pinions, meshing with thecircular geared track, and with antifric- Lion-rollers, adapted totraverse the circular smooth track, a driving-ring having countersunkinto the under face thereof a circular geared track, adapted to meshwith the pinions, and a circular smooth track, adapted to admit andengage the peripheries of the antifriction-rollers, anda gear-guardingcylinder, rigidly secured, at its upper end, to the under face of thedriving'ring and projecting downwardly therefrom to the mill-base,substantially as and for the purpose specified.

2. In a grinding-mill, in combination,a base having countersunkthereinto a circular geared track and a circular smooth track andprovided with vertical openings extending therethrough, a master-ringhaving horizontal stub-axles projecting radially inward from the insidethereof, pinions and antifrictionrollers mounted thereon, the formermeshing I with the geared track and the latter adapted to traverse thesmooth track of the base, a driving-ring having countersunk into the under face thereof a circular geared track and a circular smooth track,the former meshing with the pinions and the latter adapted to ad mit andengage the peripheries of the antifriction-rollers, a gear-guardingcylinder, rigidly secured, at its upper end, to the under face of thedriving-ring and projecting downwardly therefrom to the verticalopenings in the mill-base, and the outside and inside grinding-burs,substantially as and for the purpose specified.

OSCAR J, ZIEGLER 'Witnesses:

JOHN MCDONALD, ANN E. STARR.

